configs/broadcom_northstar: new defconfig

Broadcom Northstar family of SoCs is most commonly used for home
routers. It's an ARM platform with Cortex-A9 CPU(s).

All known Northstar devices come with CFE bootloader which almost
always expects a TRX firmware format (with exception for D-Link). Some
vendors (like Luxul and Netgear) wrap TRX in their own containers.

This board code provides:

1. Minimal kernel with support for on-SoC blocks. It enables Linux
drivers for SoC, watchdog, Ethernet, switch, USB, PCIe, LEDs).

2. Post image script building firmware images. In uses Buildroot
packages tools (lzma_alone, otrx, lxlfw) to build
bootloader-compatible images that can be flashed.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2468,6 +2468,8 @@ F:	board/avnet/s6lx9_microboard/
 F:	configs/s6lx9_microboard_defconfig
 
 N:	Rafał Miłecki <rafal@milecki.pl>
+F:	board/broadcom/northstar/
+F:	configs/broadcom_northstar_defconfig
 F:	package/firmware-utils/
 
 N:	Rahul Bedarkar <rahulbedarkar89@gmail.com>

board/broadcom/northstar/linux.config

@@ -0,0 +1,70 @@
+CONFIG_EMBEDDED=y
+CONFIG_ARCH_BCM=y
+CONFIG_ARCH_BCM_5301X=y
+CONFIG_ARCH_BCM_53573=y
+CONFIG_SMP=y
+CONFIG_NR_CPUS=2
+CONFIG_HIGHMEM=y
+CONFIG_ARM_APPENDED_DTB=y
+CONFIG_CMDLINE="ubi.mtd=ubi root=ubi0:rootfs rootfstype=ubifs"
+CONFIG_CMDLINE_FORCE=y
+# CONFIG_SUSPEND is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_BRIDGE=y
+CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_NET_DSA=y
+CONFIG_VLAN_8021Q=y
+CONFIG_PCI=y
+CONFIG_BCM47XX_NVRAM=y
+CONFIG_BCM47XX_SPROM=y
+CONFIG_MTD=y
+CONFIG_MTD_BCM47XX_PARTS=y
+CONFIG_MTD_PARSER_TRX=y
+CONFIG_MTD_BCM47XXSFLASH=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_MTD_NAND_BRCMNAND=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_UBI=y
+CONFIG_NETDEVICES=y
+CONFIG_VXLAN=y
+CONFIG_VETH=y
+CONFIG_B53=y
+CONFIG_BGMAC_BCMA=y
+CONFIG_BROADCOM_PHY=y
+CONFIG_MDIO_BUS_MUX_MMIOREG=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=2
+CONFIG_SERIAL_8250_RUNTIME_UARTS=2
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SPI=y
+CONFIG_THERMAL=y
+CONFIG_WATCHDOG=y
+CONFIG_BCM47XX_WDT=y
+CONFIG_BCMA_HOST_SOC=y
+CONFIG_BCMA_DRIVER_GMAC_CMN=y
+CONFIG_BCMA_DRIVER_GPIO=y
+CONFIG_USB=y
+CONFIG_USB_LEDS_TRIGGER_USBPORT=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_PLATFORM=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OHCI_HCD=y
+# CONFIG_USB_OHCI_HCD_PCI is not set
+CONFIG_USB_HCD_BCMA=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
+CONFIG_PHY_BCM_NS_USB2=y
+CONFIG_PHY_BCM_NS_USB3=y
+CONFIG_UBIFS_FS=y
+CONFIG_DEBUG_LL=y
+CONFIG_DEBUG_UNCOMPRESS=y
+CONFIG_EARLY_PRINTK=y

board/broadcom/northstar/post-image.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+# $1: images directory path
+# $2: device dts filename
+# $3: board id
+build_lxl() {
+	local images="$1"
+	local device="$2"
+	local board="$3"
+
+	$HOST_DIR/bin/lzma_alone e $images/zImage.$device $images/zImage.$device.lzma -d16
+	rm -f $images/zImage.$device
+	$HOST_DIR/bin/otrx create $images/$device.trx -f $images/zImage.$device.lzma -a 0x20000 -f $images/rootfs.ubi
+	rm -f $images/zImage.$device.lzma
+	$HOST_DIR/bin/lxlfw create $images/$device.lxl -i $images/$device.trx -b "$board"
+}
+
+# $1: images directory path
+# $2: device dts filename
+build_trx() {
+	local images="$1"
+	local device="$2"
+
+	$HOST_DIR/bin/lzma_alone e $images/zImage.$device $images/zImage.$device.lzma -d16
+	rm -f $images/zImage.$device
+	$HOST_DIR/bin/otrx create $images/$device.trx -f $images/zImage.$device.lzma -a 0x20000 -f $images/rootfs.ubi
+	rm -f $images/zImage.$device.lzma
+}
+
+devices="$(sed -n 's/^BR2_LINUX_KERNEL_INTREE_DTS_NAME="\([a-z0-9 \-]*\)"$/\1/p' ${BR2_CONFIG})"
+for device in $devices; do
+	case "$device" in
+		"bcm4708-smartrg-sr400ac")
+			build_trx "$1" "$device"
+			;;
+		"bcm47094-luxul-xwr-3150-v1")
+			build_lxl "$1" "$device" "XWR-3150"
+			;;
+	esac
+done

board/broadcom/northstar/readme.txt

@@ -0,0 +1,38 @@
+Broadcom Northstar
+
+Intro
+=====
+
+This readme covers Northstar family of Broadcom SoCs. It includes:
+  - BCM4708 (2 x 800 MHz)
+  - BCM47081 (1 x 800 MHz)
+  - BCM4709 (2 x 1 GHz)
+  - BCM47094 (2 x 1 GHz) (AKA BCM4709C0)
+
+Northstar platform is used in some home routers by multiple vendors. There are
+over 100 market devices based on it and they can all be supported with 1 kernel.
+
+There is no point in having separated board for each model. This board code is
+meant for all supported Northstar devices.
+
+All Northstar devices come with CFE bootloader by default. It's basically closed
+source as sources are available for some old releases only. There is no U-Boot (or
+any other) drop-in replacement or second stage loader with Northstar support.
+
+CFE supports flashing firmware images over TFTP and HTTP (depending on vendor /
+device setup).
+
+How to build it
+===============
+
+  $ make broadcom_ns_defconfig
+
+  $ make
+
+How to flash over HTTP
+======================
+
+Power on device and press (and hold) CTRL+C in serial console terminal. When CFE
+gets into prompt mode it'll automatically start built-in HTTP server. Navigate
+to http://192.168.1.1/ (unless IP was changed - verify with "ifconfig") and
+upload new firmware using a web browser.

configs/broadcom_northstar_defconfig

@@ -0,0 +1,14 @@
+BR2_arm=y
+BR2_cortex_a9=y
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/broadcom/northstar/post-image.sh"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/broadcom/northstar/linux.config"
+BR2_LINUX_KERNEL_APPENDED_ZIMAGE=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm4708-smartrg-sr400ac bcm47094-luxul-xwr-3150-v1"
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_TARGET_ROOTFS_UBI=y
+BR2_TARGET_ROOTFS_UBI_SUBSIZE=2048
+BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x1f000
+BR2_PACKAGE_HOST_FIRMWARE_UTILS=y
+BR2_PACKAGE_HOST_LZMA_ALONE=y